Power unit

Details Power unit Power unit

1985-10-25

1987-09-01

Leppink, James A.

Mining or in situ disintegration of hard material

Expansible breaking-down devices

Fluid-pressed element

299 23, E21C 3706

Patent

active

046904603

ABSTRACT:
Disclosure is made of a power unit wherein a housing is made split along its longitudinal axis. A tubular elastic vessel is internally coaxially accommodated in the housing. Disposed between the expandable portions of the housing are expanding inserts trapezoidal in section, bearing by their larger bases against the tubular elastic vessel and by the sides, against the inner walls of the housing portions. For delivery of a working medium into the space of the elastic vessel provision is made for two pipe unions, each of which is installed for longitudinal movement in a holder having a flange disposed in a circular recess made on the inner surface of the housing. An electric element surrounding the elastic vessel is installed in the same circular recess. Each of the elastic vessel ends is disposed between the pipe union and the holder.

REFERENCES:
patent: 2004787 (1935-06-01), Gillette

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